Real Examples of Software PI Claims (UK): What Actually Goes Wrong — and How to Protect Your Busines

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Real Examples of Software PI Claims (UK): What Actually Goes Wrong — and How to Protect Your Busines

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Real Examples of Software PI Claims (UK): What Actually Goes Wrong — and How to Protect Your Business

Software and IT services are built on trust. Your client trusts that your code will work, your advice will be correct, your implementation will go live on time, and your system will keep their data secure.
But Professional Indemnity (PI) claims in the software world rarely start with “bad code” alone. They usually start with a business problem: missed revenue, operational disruption, regulatory exposure, or reputational damage. Then the finger-pointing begins.
This guide walks through realistic, UK-relevant examples of software PI claims — the kind of disputes that regularly lead to allegations of negligence, breach of professional duty, misrepresentation, or failure to deliver services with reasonable skill and care.
These examples are written in a way that reflects how PI claims typically arise in the UK (including common contract terms, project structures, and regulatory pressures), without exposing any individual business.
Important note: This article is for general information only and isn’t legal advice. Every claim depends on contract wording, scope documents, evidence, and the facts of the case.

Why Software PI Claims Happen So Often (Even When You’re “Good at What You Do”)

A lot of IT firms assume PI claims only happen to sloppy developers or rogue agencies. In reality, many claims are triggered by:
  • Unclear scope and assumptions
  • Poor documentation
  • Client-side delays and changing requirements
  • Third-party integrations
  • Overpromising in proposals
  • Data protection failures
  • Project handover gaps
  • A mismatch between technical success and business outcomes
In other words: you can deliver “working software” and still face a claim if the client believes they paid for a different outcome.

Example 1: The CRM Implementation That “Worked” — But Broke Sales Reporting

What happened

A UK-based consultancy implemented a CRM for a growing B2B business. The system went live on schedule. Users could log in, create deals, and track pipelines.
However, the client later discovered that sales reporting was inaccurate. Forecasts were wrong, and the board relied on faulty reports for months. The client alleged they made hiring and stock decisions based on incorrect data.

The allegation

The client claimed the consultancy:
  • Failed to gather requirements properly
  • Failed to configure reporting correctly
  • Failed to test the system against real-world workflows
They demanded compensation for:
  • Management time spent investigating the issue
  • Costs of rework and remediation
  • Alleged business losses from bad decisions

Why this becomes a PI claim

This is a classic PI scenario: the claim is not about “the software crashed.” It’s about professional services — advice, requirements gathering, configuration, and validation.

The lesson

If your proposal includes phrases like:
  • “Improved reporting”
  • “Single source of truth”
  • “Accurate forecasting” …you need to ensure your scope, acceptance criteria, and testing plan match those promises.

Example 2: The Missed Deadline That Triggered Contract Penalties

What happened

A development agency was contracted to deliver a customer portal for a regulated business (think finance, healthcare, or utilities). The portal was linked to a wider programme with a fixed launch date.
The agency missed the deadline due to:
  • Underestimated complexity
  • Late-stage changes
  • Integration issues with a third-party API
The client incurred contractual penalties from their own customers and suppliers due to the delayed launch.

The allegation

The client alleged:
  • Negligent project planning
  • Failure to resource properly
  • Failure to warn early enough that the deadline was at risk
They pursued recovery of:
  • Penalties they had to pay
  • Costs of bringing in another supplier
  • Internal costs and reputational damage

Why this becomes a PI claim

Even if your contract limits liability, clients often argue:
  • You had a duty to advise them of risks
  • You misrepresented your ability to deliver
  • You failed to exercise reasonable skill and care

The lesson

Your PI exposure increases when:
  • The project is tied to a public launch
  • The client has downstream contractual obligations
  • You’re working in regulated or high-stakes environments

Example 3: The “Minor” Data Handling Mistake That Became a GDPR Nightmare

What happened

A software provider built a web app that collected customer data. During development, a staging environment was left accessible. A security researcher discovered it, and the client was notified.
No evidence of malicious access was proven — but the client still had to treat it as a potential incident and follow their internal breach process.

The allegation

The client alleged:
  • Failure to implement basic security controls
  • Failure to follow secure development practices
  • Failure to advise on data protection risks
The client sought recovery for:
  • Incident response costs
  • Legal and compliance costs
  • PR support and customer communications
  • Potential regulatory exposure

Why this becomes a PI claim (and sometimes overlaps with Cyber)

This can sit in a grey zone:
  • PI responds to allegations of professional negligence (e.g., failure to design securely)
  • Cyber responds to security incidents, breach response, and data-related costs
Depending on policy wording, one or both may be relevant.

The lesson

If you touch personal data, you need to treat security as part of your professional duty — not an optional add-on.

Example 4: Scope Creep Turns Into “You Promised This Was Included”

What happened

A client engaged a freelancer to build an e-commerce site. The freelancer delivered the core site, but the client expected:
  • Inventory syncing
  • Automated VAT rules
  • Integration with fulfilment software
  • Custom reporting dashboards
The freelancer viewed these as “phase two.” The client believed they were included.

The allegation

The client alleged misrepresentation and failure to deliver what was agreed. They refused to pay the final invoice and demanded compensation for hiring a replacement developer.

Why this becomes a PI claim

PI claims often arise from:
  • Disputed scope
  • Disputed deliverables
  • Disputed acceptance criteria
Even without a court case, the dispute can be expensive to defend.

The lesson

Your best defence is paperwork:
  • Clear scope statements
  • Change control
  • Written approvals
  • Defined acceptance testing

Example 5: Integration Failure With a Third-Party System (And You Get Blamed Anyway)

What happened

A software house built a system that integrated with a third-party payment provider. The payment provider changed their API behaviour with limited notice. Transactions failed intermittently.
The client’s customers experienced failed payments and abandoned purchases. Revenue dropped.

The allegation

The client alleged the software house:
  • Failed to build a resilient integration
  • Failed to monitor and alert properly
  • Failed to warn that third-party dependencies carried risk
They sought compensation for lost revenue and remediation costs.

Why this becomes a PI claim

Clients often see the supplier as “responsible for the whole solution,” even when the root cause sits with a third party.

The lesson

If your solution depends on third parties, your contract and documentation should say so clearly — and your architecture should include graceful failure where possible.

Example 6: The Accessibility Complaint That Turned Into a Claim

What happened

A public-facing website was delivered for an organisation that needed to meet accessibility standards (e.g., WCAG). After launch, users complained they couldn’t access key functions.
The client faced reputational risk and potential legal exposure. They demanded urgent remediation.

The allegation

The client alleged:
  • Failure to advise on accessibility requirements
  • Failure to deliver a compliant solution
  • Failure to test properly
They sought recovery for:
  • Rebuild costs
  • Legal advice
  • Internal time and project delays

Why this becomes a PI claim

This is a professional duty issue: the client claims you should have known and advised.

The lesson

If you work with public bodies, education, charities, or regulated industries, accessibility is often not optional — and failing to address it can trigger disputes.

Example 7: The “Wrong Advice” Claim (Tech Strategy and Architecture)

What happened

A consultant advised a client to migrate from on-prem to cloud infrastructure. The migration was completed, but costs ballooned due to poor sizing, misconfigured services, and unexpected usage patterns.
The client alleged they were advised incorrectly and that the solution was not fit for purpose.

The allegation

The client claimed:
  • Negligent advice
  • Failure to assess requirements properly
  • Failure to warn about cost risks
They pursued the consultant for:
  • Excess cloud spend
  • Remediation and re-architecture costs
  • Business disruption

Why this becomes a PI claim

PI is not just for developers. It’s for anyone providing professional advice — including architecture, security, DevOps, and transformation consulting.

The lesson

If you provide recommendations, document:
  • Assumptions
  • Options considered
  • Risks and limitations
  • Cost modelling caveats

Example 8: The IP Claim — “You Used Someone Else’s Code”

What happened

A client received a cease-and-desist letter alleging that parts of their software infringed a third party’s IP. The client traced the disputed code to a contractor used during development.
Even if the claim is ultimately defended, the client faces legal costs and disruption.

The allegation

The client alleged:
  • Failure to ensure code originality
  • Failure to manage subcontractors properly
  • Failure to provide adequate warranties/indemnities

Why this becomes a PI claim

IP infringement allegations can fall under PI depending on policy wording. Some policies include IP cover; some exclude certain IP risks.

The lesson

If you use subcontractors or reuse code libraries, you need governance:
  • Code provenance
  • Licensing checks
  • Contract clauses with subcontractors

What These Examples Have in Common

Across most software PI claims, you’ll see the same patterns:
  • The client expected a business outcome, not just “delivered code”
  • The project had assumptions that weren’t written down
  • The acceptance criteria were vague
  • The client’s losses were framed as your responsibility
  • The dispute escalated when communication broke down
PI insurance isn’t just about paying compensation. It can also provide access to specialist claims handling and legal defence — which matters because even a weak claim can be expensive to fight.

What Does Software/IT Professional Indemnity Insurance Typically Cover?

PI policies vary, but commonly cover claims alleging:
  • Negligence or breach of professional duty
  • Errors or omissions in your work
  • Misrepresentation (sometimes limited)
  • Breach of confidentiality
  • Defamation (in some cases)
  • Loss of documents/data (sometimes)
It may also cover:
  • Legal defence costs
  • Settlements or damages (where covered)
Always check the policy wording, exclusions, and endorsements — especially around cyber incidents, contractual liability, and IP.

Practical Steps to Reduce PI Risk (Without Slowing Your Projects Down)

If you want fewer disputes and stronger defence if one happens:
  • Use clear Statements of Work (SOWs) with deliverables and exclusions
  • Define acceptance criteria and sign-off steps
  • Keep change control simple but mandatory
  • Document assumptions and dependencies (including third parties)
  • Confirm key decisions in writing
  • Use secure development practices and basic security hygiene
  • Keep versioned documentation and project records

When Should a Software Business Consider PI?

If you:
  • Provide advice, development, implementation, or configuration
  • Handle client data
  • Work on business-critical systems
  • Operate under contracts with liability clauses
  • Use subcontractors
    …then PI is usually essential.
Even small freelancers can face large claims if a client alleges significant financial loss.

Get a Quote for Software/IT Professional Indemnity Insurance

At Insure24, we help UK software developers, IT consultants, agencies, MSPs, and technology firms arrange Professional Indemnity insurance that matches the reality of modern tech work — including contract-driven risk, data exposure, and complex client expectations.
If you want a quote, you can:
  • Use our online quote system, or
  • Speak to our team for a tailored review of your services and contracts
Get started today at Insure24.co.uk or call 0330 127 2333.

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